Frequency-Based RO-PUF

Main Focus Of The Chapter

A unique property of hardware element is identified to generate each bit of response whenever a challenge input applied (Suh, & Devadas, 2007). Physical unclonable function (PUF) is the widely studied CRP generator, whose response is a function of input challenge and unpredictable hardware feature. Figure1 (Reyneri, Corso, & Sacco, 1990) presents the expectation from a PUF is able to

• 1.

  Generate a unique response for each input challenge

• 2.

  Different response from different PUF for same input challenge

• 3.

  PUF response must be similar to the different operating condition.

(Becker, 2015) Silicon electronic circuit base PUF is preferred, with evidence of manufacturing variation of integrated circuit can’t have similar properties. (Hori, Yoshida, Katashita & Satoh, 2010) PUF is a basic circuit intermix input challenge with intrinsic properties of silicon IC and produces nonlinear responses. Their responses remain unpredictable even input is known and identical PUF (Kumar, Guajardo, Maes, Schrijen, & Tuyls, 2008). Security in the PUF circuit arises with inbuilt behavior of the electronic device/circuit. It is required to identify the hardware feature to generate a unique response (Rührmair, Sölter, Sehnke, 2009); 2 well-known structure of PUF is